1. 根目录:
2. fs
3. xfs
4. xfs_message.h

#ifndef __XFS_MESSAGE_H
#define __XFS_MESSAGE_H 1

struct xfs_mount;

extern __printf(2, 3)
void xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(2, 3)
void xfs_alert(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(3, 4)
void xfs_alert_tag(const struct xfs_mount *mp, int tag, const char *fmt, ...);
extern __printf(2, 3)
void xfs_crit(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(2, 3)
void xfs_err(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(2, 3)
void xfs_warn(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(2, 3)
void xfs_notice(const struct xfs_mount *mp, const char *fmt, ...);
extern __printf(2, 3)
void xfs_info(const struct xfs_mount *mp, const char *fmt, ...);

#ifdef DEBUG
extern __printf(2, 3)
void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...);
#else
static inline __printf(2, 3)
void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
{
}
#endif

#define xfs_printk_ratelimited(func, dev, fmt, ...)		\
do {									\
	static DEFINE_RATELIMIT_STATE(_rs,				\
				      DEFAULT_RATELIMIT_INTERVAL,	\
				      DEFAULT_RATELIMIT_BURST);		\
	if (__ratelimit(&_rs))						\
		func(dev, fmt, ##__VA_ARGS__);			\
} while (0)

#define xfs_emerg_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_emerg, dev, fmt, ##__VA_ARGS__)
#define xfs_alert_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_alert, dev, fmt, ##__VA_ARGS__)
#define xfs_crit_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_crit, dev, fmt, ##__VA_ARGS__)
#define xfs_err_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_err, dev, fmt, ##__VA_ARGS__)
#define xfs_warn_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_warn, dev, fmt, ##__VA_ARGS__)
#define xfs_notice_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_notice, dev, fmt, ##__VA_ARGS__)
#define xfs_info_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_info, dev, fmt, ##__VA_ARGS__)
#define xfs_debug_ratelimited(dev, fmt, ...)				\
	xfs_printk_ratelimited(xfs_debug, dev, fmt, ##__VA_ARGS__)

extern void assfail(char *expr, char *f, int l);
extern void asswarn(char *expr, char *f, int l);

extern void xfs_hex_dump(void *p, int length);

#endif	/* __XFS_MESSAGE_H */